/** * ALtoolbox 子页统一壳层：与 mainpage.htm 同系和纸灰底 + 顶栏返回 * 使用方式：在末尾加入本文件 link；； * 在正文最前加入 */ :root { --alt-bg: #eceeef; --alt-bg-tint: #e4e9ec; --alt-paper: #fcfcfb; --alt-ink: #353330; --alt-muted: #7a7874; --alt-line: #e0ded9; --alt-link: #4a6570; --alt-link-hover: #455a65; } /* 子页只在 body 上加 alt-shell 时，用 :has 让锚点滚动仍避开 sticky 顶栏 */ html:has(body.alt-shell) { scroll-padding-top: 56px; } html.alt-shell { scroll-padding-top: 56px; } body.alt-shell { /* 保留各页 body { max-width } 时仍需横向 auto，否则会被 margin:0 顶到视口一侧 */ margin: 0 auto; width: 100%; box-sizing: border-box; min-height: 100vh; font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--alt-ink); background-color: var(--alt-bg); background-image: radial-gradient(ellipse 100% 55% at 0% 0%, rgba(200, 212, 218, 0.45) 0%, transparent 52%), radial-gradient(ellipse 70% 50% at 100% 8%, rgba(218, 214, 206, 0.5) 0%, transparent 48%), linear-gradient(180deg, #f3f5f6 0%, var(--alt-bg-tint) 100%); background-attachment: fixed; } .alt-nav-bar { position: sticky; top: 0; z-index: 200; display: flex; align-items: center; flex-wrap: wrap; gap: 10px 16px; padding: 10px 16px; margin: 0 0 18px; width: 100%; max-width: 1220px; margin-left: auto; margin-right: auto; box-sizing: border-box; background: rgba(252, 252, 251, 0.94); border: 1px solid var(--alt-line); border-radius: 10px; box-shadow: 0 4px 18px rgba(53, 51, 48, 0.07); backdrop-filter: blur(10px); } .alt-nav-bar a { font-size: 0.9rem; font-weight: 600; color: var(--alt-link); text-decoration: none; } .alt-nav-bar a:hover { color: var(--alt-link-hover); text-decoration: underline; text-underline-offset: 3px; } .alt-nav-bar .alt-nav-sep { color: var(--alt-line); user-select: none; font-weight: 400; }